Tornadoes · United States · Indiana · 2026
EF1 tornado, Plymouth Muni Arpt to Nappanee, Indiana, June 11, 2026
From Plymouth Muni Arpt to Nappanee, this EF1 tornado ran 3.4 miles across Marshall and Kosciusko counties on June 11, 2026, touching down at 10:22 PM EDT and reaching 300 yards wide. It killed nobody.
Preliminary. This is NWS IWX's damage survey, filed in the Damage Assessment Toolkit as Bourbon. The rating, the path and the casualties are the survey's and can change while it is revised. The Storm Prediction Center compiles the official record of 2026 from these surveys and publishes it in the spring of 2027; this page moves to that tornado's permanent address when it does.
The rating scale
Tracks are drawn in the color of the rating. The Enhanced Fujita scale rates the damage rather than measuring the wind: the speeds are what that damage is taken to imply.
EF065 to 85 mph
Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.
EF186 to 110 mphthis tornado
Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.
EF2111 to 135 mph
Considerable damage. Roofs torn off well-built houses, frame homes shifted on their foundations, mobile homes destroyed, large trees snapped or uprooted, cars lifted off the ground.
EF3136 to 165 mph
Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.
EF4166 to 200 mph
Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.
EF5over 200 mph
Incredible damage. Strong frame houses swept off their foundations, car-sized missiles thrown more than 100 meters, steel-reinforced concrete badly damaged, high-rise buildings deformed.
Unrated
The survey recorded a tornado but could not put a number on it, most often because it crossed open country and damaged nothing a rating can be read from.
The survey
- Rating, as surveyed
- EF1, preliminary
- Date
- June 11, 2026
- Touchdown
- 10:22 PM EDT (02:22 UTC)
- Lifted
- 10:27 PM EDT (02:27 UTC)
- On the ground
- 5 minutes
- Path length
- 3.4 miles (5.5 km)
- Path width
- 300 yards (274 m)
- Deaths
- 0
- Injuries
- 0
- Counties
- Marshall and Kosciusko counties
- Touchdown point
- 41.330, -86.075
- Lift-off point
- 41.370, -86.038
- Highest wind the damage implies
- 100 mph
- Surveyed by
- NWS IWX
- The office's name for it
- Bourbon
- Survey last edited
- June 14, 2026
- Record number
- None yet. SPC numbers 2026 in the spring of 2027.
What the survey found
Another tornado, perhaps from the same parent circulation that spawned the Argos tornado, developed on the northeast side of Bourbon in Marshall County. The tornado touched down in a field, with tree damage observed in the distance just east of Beech Road and north of 10B Road. The tornado raced northeastward, striking a property where two old barns collapsed and a third was damaged. Metal roofing material was also blown off, and several trees sustained major damage, consistent with an EF-1 rating. The tornado then crossed the county line into Kosciusko County, where it impacted multiple Amish properties. In this area, a camper was flipped, several softwood trees were snapped, and maximum winds were estimated at 90 to 100 mph.
Written by NWS IWX in the NWS Damage Assessment Toolkit. A survey is revised as better evidence arrives.
The damage survey
12 damage points were recorded along this path by NWS IWX, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF1. The highest wind the damage implies is 100 mph.
- Minor tree damage. Likely start of tornado and source of CC drop out before tornado went into field.
- Snapped tees at edge of woodline. Matches perfectly to CC drop out
- Single property has medium sized tree snapped at base, part of metal roof removed from barn, and another 2 old barns collapsed
- Trees snapped and empty feed silo tipped over to the west nearby
Survey points are preliminary and are the raw material the published rating was built from. Source: NWS Damage Assessment Toolkit.
What the Weather Service recorded
A squall line raced through northern Indiana and spawned numerous tornadoes. Most tornadoes were narrow and lasted less then 10 minutes. Additional areas of straight line wind damage were noted as well.
A brief tornado spun up south of 8A on King Rd, uprooting or|snapping multiple trees and causing damage to a barn. The tornado|continued northeast, flipping a center pivot before entering a|grove of trees causing several snapped trees. The circulation|moved quickly northeast, knocking down a few more trees north of|8A Rd. The tornado quickly lifted on the north side of 8A Rd|after doing significant damage to a barn.
A brief EF-0 tornado with maximum winds estimated at 75 mph|touched down on the far southwest side of Argos in Marshall|County. Damage along the path was largely confined to trees.|Special thanks to the Marshall County EMA and Argos FD for|assisting with the survey.
Another tornado, perhaps from the same parent circulation that|spawned the Argos tornado, developed on the northeast side of|Bourbon in Marshall County. The tornado touched down in a field,|with tree damage observed in the distance just east of Beech Road|and north of 10B Road. The tornado raced northeastward, striking|a property where two old barns collapsed and a third was damaged.|Metal roofing material was also blown off, and several trees|sustained major damage, consistent with an EF-1 rating. The|tornado then crossed the county line into Kosciusko County, where|it impacted multiple Amish properties. In this area, a camper was|flipped, several softwood trees were snapped, and maximum winds|were estimated at 90 to 100 mph.
Another tornado, perhaps from the same parent circulation that|spawned the Argos tornado, developed on the northeast side of|Bourbon in Marshall County. The tornado touched down in a field,|with tree damage observed in the distance just east of Beech Road|and north of 10B Road. The tornado raced northeastward, striking|a property where two old barns collapsed and a third was damaged.|Metal roofing material was also blown off, and several trees|sustained major damage, consistent with an EF-1 rating. The|tornado then crossed the county line into Kosciusko County, where|it impacted multiple Amish properties. In this area, a camper was|flipped, several softwood trees were snapped, and maximum winds|were estimated at 90 to 100 mph.
From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.
What forecasters said that day
The local office's own words before the tornado touched down, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Northern Indiana wrote its last area forecast discussion before the tornado touched down at Jun 11, 8:34 PM EDT, 1 hour 48 minutes earlier. Its key messages:
- Chances for severe weather exist again tonight. Damaging wind, hail, heavy rain, and a few tornadoes are possible with this severe weather threat.
- Next chances for showers and storms return Saturday night with another cool frontal passage, bringing cooler temperatures into low/mid 70s to lower 80s along with decreased humidity across the area Sunday and Monday.
- A moderate swim risk exists along the southeast Lake Michigan shoreline today and Friday as waves reach 2 to 4 feet. Breaking waves and currents are expected. Stay away from dangerous areas like piers, breakwalls, and river outlets. Always have a flotation device with you in the water.
Area forecast discussion, Jun 11, 8:34 PM EDT, 1 hour 48 minutes before
Area Forecast Discussion National Weather Service Northern Indiana 834 PM EDT Thu Jun 11 2026 .KEY MESSAGES... - Chances for severe weather exist again tonight. Damaging wind, hail, heavy rain, and a few tornadoes are possible with this severe weather threat. - Next chances for showers and storms return Saturday night with another cool frontal passage, bringing cooler temperatures into low/mid 70s to lower 80s along with decreased humidity across the area Sunday and Monday. - A moderate swim risk exists along the southeast Lake Michigan shoreline today and Friday as waves reach 2 to 4 feet. Breaking waves and currents are expected. Stay away from dangerous areas like piers, breakwalls, and river outlets. Always have a flotation device with you in the water. && .UPDATE... Issued at 833 PM EDT Thu Jun 11 2026 Tornado Watch 318 has been issued through 06z for most of the area. A very unstable air mass continues to advect back northeast over the area early this evening within a ramping low level jet. Favorable low level hodo curvature enhanced by a leftover boundary from earlier convection into areas west of Interstate 69, and 40-50 kts of bulk shear in the 0-3 km layer continue to make tornadoes a concern. Higher probabilities remain for sig wind damage within any bowing segments. Storm mode as of this writing is still a little messy just upstream with attempts at a few supercells in the pre-frontal environment now getting into far nw IN. These would carry a tornado/hail/wind threat with an eventual merger into a QLCS east through the area through the early overnight. Latest HRRR and WoFS runs continue to suggest a weakening trend (becoming more outflow dominant) as this activity gets into northwest OH, though wind would still be a concern even if this occurs. A local extension of the TOR Watch or a new Svr Watch may be needed in our far eastern counties that were not included in this watch. && .DISCUSSION... Issued at 349 PM EDT Thu Jun 11 2026 Severe weather is still looking likely tonight. The main line of storms will be associated with a cold front currently located over central WI/IA and northwest MO and orientated in a northeast to southwest manner. This front will push continue to push eastward this evening and the timing still is looking good for this front to approach our western edge of the CWA around 9 PM EDT. Now there is a concern that some scattered storms may pop-up ahead of this front that could impact our area earlier due to an old linear MCS associated with an old outflow boundary that has transited eastward across eastern IA/MO and through central IL earlier today. Current radar shows that some of that activity has made it to the eastern IL/western IN border. With the very unstable airmass still present it would not take much to get storms to develop from any outflows that push out from these storms. All of the ingredients for severe weather will be present this evening with temperatures in the mid to upper 80s and dew points in the upper 60s to low 70s in place across the CWA and this will provide decent surface instability with about 2500-3500 J/kg of SB CAPE. The frontal boundary will also provide a good lifting focal point (or even a stronger outflow boundaries that may be present ahead of the front). Effective bulk shear values of 35 to 55 kts are available with the higher values located across our northwestern portions of the CWA. 300-400 m2/s2 of SR Helicity is also available ahead of the cold front which will increase the tornado threat especially earlier in the evening. SPC currently has a majority of our area under an enhanced severe storm risk this evening. The aforementioned storms that are just to the west of our area could affect the environment and mitigate some of the potential available for when the front does arrive. So will need to see how that pans out and could be a fly in the ointment. There also is the expectation that storms will weaken the further east they move through the night so the better chances for severe storms will be further west but cannot rule out a few storms remaining strong well into the overnight period if the storms can manage to remain balanced and not be overwhelmed by a descending cold pool. The storms should be through the area by 3 to 4 AM EDT and again all threats are on the table but the most likely threat will be winds and a few tornadoes. Heavy rainfall will accompany these storms but there will be good forward movement to help keep the flooding risk at bay. In the wake of the cold front we will have a cooler and drier airmass move into the area and should provide a very nice couple of mostly sunny spring days on Friday and Saturday with temperatures in the mid 70s to mid 80s. The important part is the humidity will be decreased with dew points dropping back into the 50s. The next chance of showers and storms will arrive late Saturday and into Sunday morning with another cool frontal boundary pushing through. SPC does currently have our area under a marginal risk with that but the diurnal timing looks to perhaps limit the potential of the storms and will need to monitor that once we get through tonights event. && .AVIATION /00Z TAFS THROUGH 00Z SATURDAY/... Issued at 641 PM EDT Thu Jun 11 2026 Main focus remains on timing of convective line expected to track through KSBN mid-late evening and KFWA toward midnight. Shear and instability profiles definitely hint at the risk for strong to severe convection with a brief period of 50 kt plus winds and LIFR/IFR conditions possible with the leading line. VFR/dry then post-frontal into tomorrow otherwise with westerly winds up around 12 knots. && .IWX WATCHES/WARNINGS/ADVISORIES... IN...None. OH...None. MI...None. MARINE...Small Craft Advisory until 5 AM EDT Friday for LMZ043-046. && UPDATE...Steinwedel DISCUSSION...Andersen AVIATION...Steinwedel
In the hours before
Local storm report, Jun 11, 9:33 PM EDT, 49 minutes before
Preliminary Local Storm Report
National Weather Service Northern Indiana
933 PM EDT Thu Jun 11 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0928 PM Tornado 3 ENE Wanatah 41.46N 86.83W
06/11/2026 La Porte IN Emergency Mngr
confirmed touchdown via EMA.
&&Local storm report, Jun 11, 10:01 PM EDT, 21 minutes before
Preliminary Local Storm Report
National Weather Service Northern Indiana
1001 PM EDT Thu Jun 11 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0947 PM Tstm Wnd Dmg Clymers 40.71N 86.45W
06/11/2026 Cass IN Public
tree downed onto truck.
&&Local storm report, Jun 11, 10:11 PM EDT, 11 minutes before
Preliminary Local Storm Report
National Weather Service Northern Indiana
1011 PM EDT Thu Jun 11 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0955 PM Tstm Wnd Dmg 3 NNE Dunkirk 40.79N 86.37W
06/11/2026 Cass IN Emergency Mngr
tree down.
&&Local storm report, Jun 11, 10:22 PM EDT, 0 minutes before
Preliminary Local Storm Report
National Weather Service Northern Indiana
1022 PM EDT Thu Jun 11 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1007 PM Tstm Wnd Gst Peru 40.75N 86.07W
06/11/2026 E65 MPH Miami IN Public
&&The air that afternoon
The radiosonde launches on either side of the tornado, from the nearest station that was launching then, drawn and analyzed the way Storm Lab does: the same diagram, the same parcel and shear definitions SPC's mesoanalysis uses.
Lincoln, IL (KILX), 12:00Z
9.6 hours after it, 252 km from the path. June 12, 2026.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- -10754 J/kg
- Surface CAPE
- 0 J/kg
- Mixed-layer LCL
- 1364 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- -26 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
- 0-3 km lapse rate
- 2.9 K/km
The surface observations
Warsaw Municipal (ASW), 20 km from the path, in the two hours either side.
| Time (UTC) | Temp (°F) | Dew point (°F) | Wind | Gust (kt) | Pressure (mb) | Weather |
|---|---|---|---|---|---|---|
| 00:00 UTC |
From the Iowa Environmental Mesonet's archive of airport observations.
The radar
The Northern Indiana radar (KIWX), 30 km away, was scanning. The volume nearest the touchdown began at 02:23 UTC.
Open the radar archive at this moment, over the track
Reflectivity and velocity, decoded from the Level II archive in the browser. Volumes take a few seconds to open the first time.
This ground now
The live radar over the trackEvery 2026 tornado in IndianaEvery tornado in Indiana since 1950Warnings in force in Indiana nowThe forecast where you are
The other tornadoes of June 11, 2026
64 more have been surveyed in the United States that day, so far.
| Date | Time | Rating | Where | Path (mi) | Width (yd) | Deaths | Injuries | Damage |
|---|---|---|---|---|---|---|---|---|
| June 11 | 5:10 AM CDT | EF1 | Cass, NE | 2.0 | 40 | |||
| June 11 | 5:15 AM CDT | EF0 | Cass, NE | 0.3 | 20 | |||
| June 11 | 5:21 AM CDT | EF1 | Cass, NE | 2.0 | 40 | |||
| June 11 | 5:29 AM CDT | EF1 | Fremont, IA | 1.5 | 30 | |||
| June 11 | 5:33 AM CDT | EF0 | Mills, IA | 1.7 | 20 | |||
| June 11 | 5:58 AM CDT | EF1 | Page, IA | 7.2 | 100 | |||
| June 11 | 6:08 AM CDT | EF1 | Montgomery, IA | 5.7 | 0 | |||
| June 11 | 6:08 AM CDT | EF1 | Montgomery, IA | 5.7 | 0 | |||
| June 11 | 6:11 AM CDT | EF1 | Page, IA | 1.9 | 50 | |||
| June 11 | 6:26 AM CDT | EF2 | Adams, IA | 6.0 | 200 | |||
| June 11 | 4:05 PM CDT | Unrated | Washington, IA | 0.1 | 0 | |||
| June 11 | 4:15 PM CDT | Unrated | Hancock, IL | 0.2 | 0 | |||
| June 11 | 4:54 PM CDT | Unrated | McDonough, IL | 0.1 | 0 | |||
| June 11 | 4:56 PM CDT | EF3 | Woodford, IL | 11.2 | 930 | |||
| June 11 | 5:17 PM CDT | EF0 | Fulton, IL | 2.4 | 30 | |||
| June 11 | 5:31 PM CDT | Unrated | Fulton, IL | 0.2 | 20 | |||
| June 11 | 5:31 PM CDT | EF1 | LaSalle, IL | 4.4 | 500 | |||
| June 11 | 5:32 PM CDT | EF3 | Livingston, IL | 11.9 | 600 | 7 | ||
| June 11 | 5:44 PM CDT | EF1 | Livingston, IL | 22.8 | 900 | |||
| June 11 | 5:55 PM CDT | Unrated | Livingston, IL | 0.8 | 250 | |||
| June 11 | 5:58 PM CDT | Unrated | LaSalle, IL | 0.3 | 100 | |||
| June 11 | 6:08 PM CDT | EF1 | Tazewell, IL | 12.9 | 300 | |||
| June 11 | 6:12 PM CDT | EF1 | Kenosha, WI | 0.5 | 75 | |||
| June 11 | 6:12 PM CDT | Unrated | Bureau, IL | 1.4 | 0 | |||
| June 11 | 7:01 PM CDT | Unrated | Lee, IL | 6.0 | 50 | |||
| June 11 | 7:06 PM CDT | EF0 | McLean, IL | 11.0 | 100 | |||
| June 11 | 7:08 PM CDT | Unrated | Kankakee, IL | 0.6 | 50 | |||
| June 11 | 7:11 PM CDT | EF0 | Lake, IN | 6.0 | 150 | |||
| June 11 | 7:20 PM CDT | EF1 | Champaign, IL | 9.1 | 0 | |||
| June 11 | 7:23 PM CDT | EF1 | Ford, IL | 6.9 | 100 | |||
| June 11 | 7:25 PM CDT | EF2 | Lake, IN | 6.5 | 700 | 1 | ||
| June 11 | 7:26 PM CDT | EF1 | Champaign, IL | 3.0 | 150 | |||
| June 11 | 7:32 PM CDT | EF0 | Lake, IN | 4.1 | 150 | |||
| June 11 | 7:36 PM CDT | EF0 | Lake, IN | 12.7 | 200 | |||
| June 11 | 7:39 PM CDT | EF1 | Vermilion, IL | 13.6 | 100 | |||
| June 11 | 7:44 PM CDT | EF1 | Vermilion, IL | 8.1 | 100 | |||
| June 11 | 7:45 PM CDT | EF0 | Iroquois, IL | 2.1 | 250 | |||
| June 11 | 7:48 PM CDT | EF1 | Iroquois, IL | 1.2 | 50 | |||
| June 11 | 7:48 PM CDT | EF3 | Lake, IN | 22.5 | 450 | |||
| June 11 | 7:52 PM CDT | EF1 | DuPage, IL | 3.0 | 400 | |||
| June 11 | 7:58 PM CDT | EF0 | Newton, IN | 12.6 | 200 | |||
| June 11 | 8:58 PM EDT | EF1 | Benton, IN | 12.3 | 250 | |||
| June 11 | 7:58 PM CDT | EF0 | Newton, IN | 15.6 | 200 | |||
| June 11 | 8:59 PM EDT | EF0 | Warren, IN | 10.5 | 75 | |||
| June 11 | 8:04 PM CDT | EF0 | DuPage, IL | 1.3 | 150 | |||
| June 11 | 8:15 PM CDT | EF2 | Cook, IL | 8.3 | 350 | 6 | ||
| June 11 | 8:23 PM CDT | Unrated | Porter, IN | 0.2 | 10 | |||
| June 11 | 9:29 PM EDT | EF0 | Barry, MI | 4.6 | 50 | |||
| June 11 | 9:31 PM EDT | EF0 | Kent, MI | 4.2 | 70 | |||
| June 11 | 9:31 PM EDT | EF0 | Carroll, IN | 3.4 | 75 | |||
| June 11 | 9:43 PM EDT | EF0 | Carroll, IN | 0.3 | 25 | |||
| June 11 | 9:46 PM EDT | EF1 | Cass, IN | 0.8 | 250 | |||
| June 11 | 9:58 PM EDT | EF1 | Cass, IN | 1.5 | 100 | |||
| June 11 | 10:11 PM EDT | EF1 | Marshall, IN | 0.7 | 125 | |||
| June 11 | 10:11 PM EDT | EF0 | Marshall, IN | 2.9 | 125 | |||
| June 11 | 10:33 PM EDT | EF1 | Huntington, IN | 5.8 | 75 | |||
| June 11 | 10:39 PM EDT | EF1 | Huntington, IN | 7.9 | 50 | |||
| June 11 | 10:42 PM EDT | EF2 | Elkhart, IN | 6.1 | 100 | 1 | ||
| June 11 | 10:44 PM EDT | EF1 | Huntington, IN | 0.7 | 25 | |||
| June 11 | 10:59 PM EDT | EF1 | LaGrange, IN | 9.9 | 1,300 | 1 |
What this means
Ratings are the survey's, read off the damage rather than measured; the rating scale is above. A survey can be revised, so the rating, the path and the casualties can all still change.
Sources
NWS Damage Assessment Toolkit, the record the survey teams file from the damage, and NOAA Storm Prediction Center storm reports. Neither is the official database for 2026, which SPC publishes in the spring of 2027.